Wall-crane



F. C. BFGGERI, 1a. WALL CRANE.

@gi-@med .me 2s, 1921i.,

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. INVENTOH.

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WALL CRANE APmicArloN FILED APR. 7, 1921.

1,383,065, Patented June 28, 92.

2 SHEETS-SHEET 2.

OOOOOOOO flanged wheels, as indicated.

UNITED STA'llELS 'Tlhl'l' QFFICE..

FLORENCE C. BIGGERT, JR., 0F PITTSBURGH, PENNSYLVANIA.

WALL-CRANE.

Application filed April 7,

To all whom I? may concern.'

Be it known that l, FLORENCE C. Biostar, Jr., a citizen ot the United States, residing at Pittsburgh, in the county o'f Allegheny and State of Pennsylvania, have invented new and useful Improvement in lVall- (lranes,y of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part ol" this specification, in which:

Figure l. is a view partly in end elevation and partly in vertical section, ot a wall crane embodying my invention.

Fig. 2 is a sectional elevation oli' a portion of the crane on a larger scale.

My invention has relation to improv'L ments in wall cranes, and is designed to provide novel means i'or supporting and driving the crane, whereby the load is much more eiliciently carried. The invention also providesl a crane of this character in which the driving and supporting arrangement is such that the crane' may be set closely, against the wall or other lateral supporting structure. Other advantages ot my invention will hereinafter appear.

Referring to the accompanying drawings in which l have shown a 'preferred embodiment of my invention. the numeral 2 desig natos the triangular trame ot a wall crane, which may, in general, be of any usual and suitable construction. 3 designates the movable trolley or carriage of the wall crane.

ln accordance with my invention, l provide supporting'means for the crane where by the weight of the load is directly carried at the upper inner portion ot the crane structure. The load support comprises two rails a and which are supported obliquely, preferably at o to each other and and at opposite angles of 450 to a vertical plane passing between the two rails. These rails are supported in any suitable way from the vertical columns 6 of the building, as by means oit the brackets 7 carrying an angle 8 to opposite lianges of which the rails 4.- and 5 are secured.

9 designates a housing in which are journaled two sets of wheels l0 and ll, the wheel l0 traveling on the track rail d and the wheel l1 traveling on the track rail 5. Preferably both of these wheels are double- The axes of these wheels are, of course, at the same angle as the axis of the rails, the wheel ll being carried directly on the driving shaft l2,

Specification of Letters Patent.

.Patented J une 28, 1921.

1921. serial No. 459,260.

while the wheel l0 carried by a shaft l?) which is connected to the shaft l2 through two bevel gear wheels let. 'll he shaft l2 has a bevel gear drive connection l5 with an electric motor 16.

rit the lower corner or heel oi the crane. l provide a horizontal thrust wheel 17, which bears against the head of horizontal rail 18 secured to the column 6.

lt will be noted that by reason of the tracks 4 and being placed at angles of approximately 900 to each other and in olilique planes which are 450 to a vertical plane, the

two wheels lO and ll act effectively against each other to resist the load, 'it being impossible for the wheels to leave the track rails; and that the two rails will ellectivelv receive the direct weight ot the crane and its load. ln this manner, the entire weight of the load is carried at the upper inner poi tion ot the crane, the wheel l? acting merely as a guide and thrust wheel and requiring' only the provision of a light track and support therefor.

lt will be further noted that the arrangement of the tracks Ll and 5, the wheels ul0 and ll, and the driving gearing, is suoli that the vertical post 2 of the crane frame can be set relatively close to the column G. lt will also be noted that the described supporting arrangement lends itself very readily to a positive driving of both sets or" supporting wheels. The construction and arrangement' also permits the electric motor 16 to be located in the upper angle ot the crane adjacent to the support and not only out ot the way but where its weig it is carried on a short leverage from the peints oli support. Obviously, the crane may be provided with two or more sets oli the wheels l0 and ll.

A further advantage olE my invention is that the combined load on the driving wheels will increase the carriage 3 moves outwardly from the support, thus increasing the traction eilect ot said wheels at the same time that the frictional resistance of the non-driving wheels l17 is increasing, and decreasing the traction effect as the resistance ot the non-driving wheels decreases.

ln the drawings, l have shown the wall crane as carried on the same supports as those which carry the track 19 for theoverhead traveling crane 20, indicated in dotted lines in Fig. l. lt will be understood, however, that my invention is not limited in this respect but that the track rails 4 and 5 may be carried in any suitable manner on the building frame. It will also be understood that I do not limit myself to the particular construction and arrangement of the parts which I have herein shown and described, as these may be widely changed in detail without departing from the spirit and scope of the appended claims. While I have speciiied the two track rails and the wheels as being in planes which are approximately 90 to each other, it will be understood that the degree of angularity may be considerably varied.

I claim: y

l. A wall cranehaving a movable carriage mounted thereon, and having its load supporting and driving means carried at the upper inner portion of the crane structure, and having driving means including driving wheels arranged to cause the load, and consequently the traction, on said wheels to in crease as tliecrane carriage is moved outwardly from the support, substantially as described.

Y 2. A wall crane having a movable carriage mounted thereon, and having its load supporting and driving means carried at the upper inner portion of the crane structure and having a thrust bearing at its lower inner portion, together with driving' means having driving wheels arranged to' cause the load, and consequently the traction, on said wheels to increase as the crane carriage moves outwardlyV on its support, substan` tially as described. Y

3.71%. wall eranehaving its load supporting Vand driving means carried at the upper inner portion of the crane structure, said support comprising two sets of wheels and track rails therefor, said wheels being in oblique planes, substantially as described.

Ll. A wall crane having its load supporting and driving means carried at the upper inner portion of the crane structure, said support comprising two sets of wheels and track rails therefor, said wheels being in oblique planes at approximately 90 to each other and at opposite angles of approximately 45o to a vertical plane passing between the rails, substantially as described.

5. A wall cranehaving two sets of load supporting rails arranged at an angle of approximately 90o to each other and at opposite angles of approximately 45 to a vertical plane Vpassing between the rails, substantially as described.

6. A wall crane having two sets of, load supporting rails arranged at approximately right angles to each other and at opposite angles to a vertical plane passing between the rails, together with flanged wheels engaging the rails, and means for positively driving the wheels, substantially as described. Y

7. In a wall crane, the combination with two supporting rails set obliquely at opposite angles to a vertical plane passing between them, of a crane having wheels engaging said rails, said wheels being carried on oblique shafts, and means for positively driving said shafts and wheels, substantially as described.

8. In a wall crane, the combination with two supporting rails at approximately right angles to each other and at opposite angles to at vertical plane passing between them, of a crane frame having ahousing at its upper inner portion, a drive shaft journaled in said housing and having a flanged wheel engaging one of said rails, another shaft journaled in said housing at an angle to the drive shaft and carrying a flanged wheel engaging the other of said rails, and gearing connect-v ing said shafts, substantially as described.

9. In a wall crane, the combination with tivo supporting rails at an angle of approximately 900 to each other and at opposite angles of approximately 45 to a Vertical plane 'passing between them, of a crane frame having a housing at its upper inner portion, a drive shaft journaled in said housing and having a flanged wheel engaging one of said rails, another shaft journaled in said housing at an angle of approximately 90o to the drive shaft and carrying a flanged wheel engaging the other of said rails, and gearingconnecting said shafts, together with a driving motor mounted at the upper inner portion of the crane and geared to said drive shaft, substantially as described.

In testimony whereof, I have hereunto set my hand.

FLORENCE o. BIGGERT, JR. 

